/* monochrome-pro — site 9 — LLC Launchpad
   pure white, deep charcoal type, single cobalt accent on links + active nav.
   Editorial consulting-firm feel. Strong type hierarchy. Square corners. No shadows. */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

:root {
  --bg: #ffffff;
  --text: #111111;
  --accent: #1c4cff;
  --muted: #6b6b6b;
  --surface: #f2f2f2;
  --rule: #e3e3e3;
  --heading-font: 'Space Grotesk', sans-serif;
  --body-font: 'Inter', system-ui, sans-serif;
  --measure: 68ch;
  --gutter: clamp(1.25rem, 4vw, 2.75rem);
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body-font);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* layout container */
.wrap {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* HEADER --------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--rule);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}
.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}
.brand-mark img { height: 52px; width: auto; }
.brand-mark .brand-name {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--text);
}
.primary-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
  font-family: var(--heading-font);
  font-size: 0.94rem;
  font-weight: 500;
}
.primary-nav a {
  color: var(--text);
  position: relative;
  padding-bottom: 4px;
  letter-spacing: 0.01em;
}
.primary-nav a:hover { color: var(--accent); }
.primary-nav a.active {
  color: var(--accent);
}
.primary-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--accent);
}

/* HERO ----------------------------------------------------- */
.hero {
  border-bottom: 1px solid var(--rule);
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.hero .eyebrow {
  font-family: var(--heading-font);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin: 0 0 1.5rem;
}
.hero h1 {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: clamp(2.6rem, 6.4vw, 5.25rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
  margin: 0 0 1.5rem;
  color: var(--text);
}
.hero .lede {
  font-size: 1.18rem;
  line-height: 1.55;
  color: #2a2a2a;
  max-width: 50ch;
  margin: 0;
}
.hero figure { margin: 0; }
.hero img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  filter: grayscale(0.05) contrast(1.02);
}

/* SECTION META ROW (small caption strip under hero) */
.meta-row {
  border-bottom: 1px solid var(--rule);
  font-family: var(--heading-font);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.meta-row .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.meta-row span strong {
  color: var(--text);
  font-weight: 600;
  margin-left: 0.4rem;
}

/* MAIN CONTENT --------------------------------------------- */
main { padding: clamp(3rem, 7vw, 5.5rem) 0; }
.article {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
}
.article aside.toc {
  position: sticky;
  top: 110px;
  align-self: start;
  font-family: var(--heading-font);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  border-top: 2px solid var(--text);
  padding-top: 1rem;
}
.article aside.toc h4 {
  font-size: 0.78rem;
  margin: 0 0 1rem;
  letter-spacing: 0.22em;
  color: var(--text);
}
.article aside.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: toc;
}
.article aside.toc li {
  counter-increment: toc;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--rule);
}
.article aside.toc li::before {
  content: counter(toc, decimal-leading-zero);
  margin-right: 0.6rem;
  color: var(--accent);
  font-weight: 600;
}
.article-body { max-width: var(--measure); }

.article-body h2 {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: clamp(1.55rem, 3vw, 2.05rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 3.4rem 0 1.1rem;
  color: var(--text);
  position: relative;
  padding-top: 1.4rem;
  border-top: 2px solid var(--text);
}
.article-body h2:first-of-type { margin-top: 0; }
.article-body h2 .num {
  display: block;
  font-family: var(--heading-font);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.article-body h3 {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
  margin: 2rem 0 0.6rem;
  color: var(--text);
}
.article-body p {
  margin: 0 0 1.15rem;
  color: #1d1d1d;
}
.article-body p a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.article-body p a:hover {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}
.article-body ul {
  margin: 0 0 1.4rem;
  padding-left: 1.1rem;
}
.article-body ul li {
  margin-bottom: 0.4rem;
}
.article-body ul li::marker { color: var(--accent); }

.article-body figure {
  margin: 2.4rem 0;
}
.article-body figure img {
  width: 100%;
  height: auto;
  filter: grayscale(0.04) contrast(1.02);
}
.article-body figure figcaption {
  font-family: var(--heading-font);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  border-left: 2px solid var(--accent);
  padding-left: 0.75rem;
  margin-top: 0.8rem;
}

.pull {
  border-top: 2px solid var(--text);
  border-bottom: 1px solid var(--rule);
  font-family: var(--heading-font);
  font-weight: 500;
  font-size: clamp(1.35rem, 2.6vw, 1.8rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  padding: 1.6rem 0;
  margin: 2.6rem 0;
  color: var(--text);
}
.pull::before {
  content: "Note";
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--accent);
  margin-bottom: 0.8rem;
  font-weight: 600;
}

/* simple internal CTA paragraph */
.return-link {
  margin-top: 3rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.6rem;
  font-family: var(--heading-font);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}
.return-link a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* FOOTER --------------------------------------------------- */
.site-footer {
  border-top: 2px solid var(--text);
  background: #fff;
  padding: 3.5rem 0 2rem;
  margin-top: 4rem;
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
.site-footer .brand-block .name {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
}
.site-footer .brand-block .tag {
  color: var(--muted);
  max-width: 42ch;
  margin: 0 0 1.4rem;
}
.site-footer .brand-block .copy {
  font-family: var(--heading-font);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.site-footer .pages-col h4 {
  font-family: var(--heading-font);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  margin: 0 0 1rem;
  color: var(--text);
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--text);
}
.site-footer .pages-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-footer .pages-col li {
  border-bottom: 1px solid var(--rule);
}
.site-footer .pages-col li a {
  display: block;
  padding: 0.6rem 0;
  font-family: var(--heading-font);
  font-size: 0.94rem;
  color: var(--text);
}
.site-footer .pages-col li a:hover { color: var(--accent); }

/* RESPONSIVE ----------------------------------------------- */
@media (max-width: 960px) {
  .article { grid-template-columns: 1fr; }
  .article aside.toc { position: static; }
  .hero .wrap { grid-template-columns: 1fr; }
  .hero img { aspect-ratio: 16/10; }
}
@media (max-width: 768px) {
  body { font-size: 16px; }
  .site-header .wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
  }
  .primary-nav {
    width: 100%;
    overflow-x: auto;
    gap: 1.2rem;
    padding-bottom: 0.3rem;
  }
  .primary-nav a { white-space: nowrap; }
  .site-footer .wrap { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .hero { padding-top: 2.4rem; }
  .meta-row .wrap { gap: 1rem; }
  .article-body h2 { margin-top: 2.4rem; }
}